Design of narrow pulse light source driving circuit of laser fuze

Aiming at the miniaturization and high performance requirements of laser fuze, a novel driving circuit was designed to drive the pulse laser diode. The circuit used high-speed MOSFET as the switching element to generate a driving pulse with narrow pulse width, short rise time and large peak current for laser diode. A corresponding driving circuit model was established. The effects of supply voltage, energy storage capacitor and damping resistor on the performance of driving pulse were analyzed by simulation and experiment. A driving circuit with the size of 19 mm10 mm was designed and the optimal circuit parameters were selected. The driving circuit provides a driving pulse with pulse width of 8.6 ns, rise time of 4 ns and peak current of 39 A. The design provides an effective improvement of detection performance of laser fuze.